Episode 1
Rookie cop Souvik joins Kanaichoron, a laid back, unambitious senior inspector at the Department of Unusual cases. Meanwhile, a mysterious stranger is terrorizing the villages of Bengal by killing off hundreds of sparrows.
Episode 2
Forensic expert Mrinalini helps in the investigation. As the cops try to understand the motive of the killer, a veteran informer is their only hope.
Episode 3
The sparrow killer strikes again and leaves back a clue that makes Kanaichoron and Souvik see some light at the end of the tunnel. Also, the duo finally identifies a pattern in the serial killings.
Episode 4
A cat and mouse game begins between the elusive killer and the cops. Meanwhile, Souvik accidentally uncovers a vital part of the puzzle.
Episode 5
Some unexpected incidents throw the duo off the rails. Souvik starts to question Kanaichoron’s credibility and wonders if he is wasting his career working on an apparently pointless case.
Episode 6
As Kanaichoron and Souvik have a climactic face-off with the sparrow killer, shocking truths are revealed.